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"IDENTIFICACION"
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Huanglongbing: a destructive, newly-emerging, century-old disease of citrus Asia; South Africa; Brazil; Florida
2006
A detailed account is given of the history, aetiology, biology, epidemiology, detection, geographical distribution, and control of huanglongbing (HLB), a destructive disease of citrus that represents a major threat to the world citrus industry, and is slowly invading new citrusgrowing areas. HLB, whose name in Chinese means \"yellow dragon disease\", was first reported from southern China in 1919 and is now known to occur in next to 40 different Asian, African, Oceanian, South and North American countries. The agent is a phloem-restricted, non cultured, Gram-negative bacterium causing crippling diseases denoted \"greening\" in South Africa, \"mottle leaf\" in the Philippines, \"dieback\" in India, \"vein phloem degeneration\" in Indonesia. The HLB bacterium belongs to the genus Candidatus Liberibacter, three species of which are currently known, Candidatus Liberibacter asiaticus, occurring in Asian countries and, to a lesser extent, in Brazil and the USA (Florida), Candidatus Liberibacter africanus with its subspecies \"capensis\", recorded from African countries, and Candidatus Liberibacter americanus present in Brazil. The suggestion is that each liberibacter species has evolved in the continent after which it is named. HLB symptoms are virtually the same wherever the disease occurs. Infected trees show a blotchy mottle condition of the leaves that results in the development of yellow shoots, the early and very characteristic symptom of the disease. Trees are stunted, declining and bear a few, small-sized, and deformed (lop-sided) fruits, that are poorly coloured (greening) and with coloration starting at the peduncular end (colour inversion). HLB can be transmitted by grafting from citrus to citrus and by dodder to periwinkle. The psyllids Trioza erytreae and Diaphorina citri are natural vectors. Two different types of HLB are known: the heat-sensitive African form transmitted by T. erytreae, which develops at temperatures of 22-25°C, and the heat-tolerant Asian form, transmitted by D. citri, which stands temperatures well above 30°C. Although the HLB pathogen can be identified by electron microscopy, other laboratory methods are used for routine detection. ELISA with monoclonal antibodies is not recommended. Better systems are dot blot hybridization with a DNA probe, and various PCR formats (one-step, nested, multiplex) using species-specific primers based on 16S rRNA or rplKAJL-rpoBC operon sequences. Because no curative methods of HLB are available, control is preventive and largely based on inoculum elimination by removal of infected trees and chemical treatments against vectors. Strict quarantine measures must be implemented to impair further international spread of HLB agents and their vectors.
Journal Article
Identification of pathogenic fungi
by
Campbell, Colin
,
Warnock, David
,
Johnson, Elizabeth
in
Fungi -- isolation & purification
,
Fungi -- pathogenicity
,
Fungi imperfecti
2013
\"A fully updated edition of this highly regarded textbook, incorporating new colour photographs of key species and their microscopic features, information on the latest antifungal drugs, and updated taxonomic information. Endorsed by the Health Protection Agency and written by world renowned experts in medical mycology\"--Provided by publisher.
Domestic violence victims in a hospital setting: prevalence, health impact and patients' preferences - results from a cross-sectional study
2019
Background: Domestic violence (DV) is a widespread yet commonly underdetected problem with severe impact on physical and mental health. To date, only limited information is available on prevalence and detection-rates of victims of DV in hospital settings.
Objective: The aim of this study was (a) to assess the prevalence and impact of DV on physical and mental health as well as risk-factors associated with it, (b) to determine how many patients had been asked directly about DV in the hospital and (c) to investigate patients' preferences about being asked about DV in a hospital setting.
Methods: Adult inpatients and outpatients at seven somatic departments at the University Hospital Innsbruck (Austria) were included consecutively in this ad-hoc, cross-sectional paper-and-pencil questionnaire-based study. In total, n = 2,031 patients were assessed regarding their experiences with DV. They also reported on whether they had been asked about DV at the hospital and whether they would mind being asked about it. To evaluate the impact of DV on patients' self-reported physical and mental health, odds ratios were calculated using binary logistic regression.
Results: DV was reported by 17.4% of patients, with 4.0% indicating current DV exposure. Lifetime DV exposure was associated with a significant risk for both physical and mental health-problems. Only 4.8% of patients with DV exposure had ever been asked about it by hospital staff. While patients with a history of DV were more open to being asked about DV than patients without DV (78.2% vs. 72.9%), overall acceptance was still high (74%).
Conclusion: DV is a frequently overlooked problem with detrimental effects on physical and mental health. While high acceptance of DV assessment was found, only a small proportion of affected patients had indeed been assessed for DV. Screening for DV in hospitals may thus increase the number of identified patients.
* Domestic violence (DV) is a major health concern in healthcare facilities.* DV remains an underdetected issue in the context of hospitals.* Only 4.8% of patients who experienced DV had been asked about DV at the hospital.* Most patients do not mind being asked about DV in a hospital setting.* Acceptance of DV screening was higher among patients with a history of DV.* Screening for DV and specific training for healthcare professionals may improve the detection rate of DV.
Journal Article
Prevalence of mastitis pathogens in milk from clinically healthy cows
by
Vlkova, H., Veterinary Research Institute, Brno (Czech Republic)
,
Vrtkova, I., Mendel University, Brno (Czech Republic). Laboratory of Agrogenomics
,
Borodacova, I., Veterinary Research Institute, Brno (Czech Republic)
in
AETIOLOGY
,
AGENT PATHOGENE
,
Ampicillin
2013
A total of 669 individual cow milk samples originating from asymptomatic cows from 16 dairy farms were examined for the presence of microorganisms with the potential to cause mastitis. Coagulase-negative staphylococci clearly predominated (53.5% positive samples) followed by streptococci and enterococci (both occurring in 16.1% samples). Among streptococci, so-called mastitis streptococci (S. uberis, S. dysgalactiae and S. agalactiae) prevailed (11.7% positive samples). Enterobacteriaceae were found in 10.0% samples, most of which (6.6% samples) were positive for Escherichia coli. Yeasts (mainly Candida spp.) were found in 8.2% samples. One of the major mastitis pathogens, Staphylococcus aureus subsp. aureus, was isolated from 9.0% of samples. S. aureus isolates were further characterised in terms of their capability to form biofilm, antimicrobial susceptibility and clonality (PFGE). All S. aureus isolates were capable of biofilm formation and were generally susceptible to the majority of tested antibiotics. The exception was ampicillin, resistance to which was observed in 27.7% isolates. Therefore, the relatively frequent occurrence of S. aureus could be attributed to persistent intramammary infections due to biofilm formation rather than low efficacy of particular antibiotics. PFGE analysis revealed clonal spread of certain S. aureus isolates within and between farms indicating that certain lineages of S. aureus mastitis strains are particularly successful.
Journal Article
Identification and Classification of Bulk Paddy, Brown, and White Rice Cultivars with Colour Features Extraction using Image Analysis and Neural Network
by
Golpour, I., Bu-Ali Sina University, Hamedan (Iran). Dept. of Agricultural Machinery Engineering
,
Parian, J.A., Bu-Ali Sina University, Hamedan (Iran). Dept. of Agricultural Machinery Engineering
,
Chayjan, A., Bu-Ali Sina University, Hamedan (Iran). Dept. of Agricultural Machinery Engineering
in
Accuracy
,
Algorithms
,
ANALISIS DE IMAGENES
2014
We identify five rice cultivars by mean of developing an image processing algorithm. After preprocessing operations, 36 colour features in RGB, HSI, HSV spaces were extracted from the images. These 36 colour features were used as inputs in back propagation neural network. The feature selection operations were performed using STEPDISC analysis method. The mean classification accuracy with 36 features for paddy, brown and white rice cultivars acquired 93.3, 98.8, and 100%, respectively. After the feature selection to classify paddy cultivars, 13 features were selected for this study. The highest mean classification accuracy (96.66%) was achieved with 13 features. With brown and white rice, 20 and 25 features acquired the highest mean classification accuracy (100%, for both of them). The optimised neural networks with two hidden layers and 36-6-5-5, 36-9-6-5, 36-6-6-5 topologies were obtained for the classification of paddy, brown, and white rice cultivars, respectively. These structures of neural network had the highest mean classification accuracy for bulk paddy, brown and white rice identification (98.8, 100, and 100%, respectively).
Journal Article
RF in RFID - Passive UHF RFID in Practice
by
Dobkin Daniel M
in
Computer Hardware Engineering
,
Identification
,
Processors, Memory & Peripherals
2008,2007
This book includes a survey of all RFID fundamentals and practices in the first part of the book while the second part focuses on UHF passive technology. This coverage of UHF technology and its components including tags, readers, and antennas is essential to commercial implementation in supply chain logistics and security. Readers of this book should have an electrical engineering background, but have not yet dealt with RFID. To this end, the author is very careful to illustrate all concepts and detail his explanations meticulously. In this way, he will bring the reader along organically showing him/her what to expect, develop, and use while implementing an RFID system.
Pest control strategies and damage potential of seed-infesting pests in the Czech stores - a review
by
Aulicky, R., Crop Research Institute, Prague (Czech Republic). Dept. of Stored Pest Control and Food Safety
,
Stejskal, V., Crop Research Institute, Prague (Czech Republic). Dept. of Stored Pest Control and Food Safety
,
Kucerova, Z., Crop Research Institute, Prague (Czech Republic). Dept. of Stored Pest Control and Food Safety
in
ACARIEN NUISIBLE
,
ACAROS NOCIVOS
,
AGRICULTURAL PRODUCTS
2014
This work reviews the historical and current pest risks and research concerning seed storage in the Czech Republic (CR). Stored seed pests (i.e. animals causing injuries to the germ and endosperm) represent a high risk of economic damage due to the high value of seeds coupled with long-term seed storage in small storage units (e.g., boxes, satchels). Rodents represent a significant risk to all types of seeds, especially seeds stored in piles or bags. Mites, psocids, and moths are the main pests of stored grass and vegetable seeds: mites can decrease seed germinability by 52% and psocids caused 9.7% seed weight loss in broken wheat kernels after 3 months of infestation under laboratory conditions. Although beetles (Sitophilus sp., Tribolium sp., Oryzaephilus sp.) and moths (Plodia sp.) are common pests of grain seeds (e.g., wheat, barley, maize), two serious seed pests, Sitotroga cereallela and S. zemays, are rare in the CR. Bruchus pisorum is a common pest of pea seeds, while other Bruchids are rare in the Czech legume seed stores. Currently, the control of seed pests is becoming difficult because the efficient pesticides (e.g., methylbromide, dichlorvos, drinking anticoagulant rodent baits) for seed protection have been lost without the development of adequate substitutes. New research on seed protection in the CR using biological control (mite predators Cheyletus sp.), low pressure, modified atmospheres, and hydrogen cyanide is overviewed.
Journal Article
Neotropical Monogenoidea. 58. Three new species of Gyrodactylus (Gyrodactylidae) from Scleromystax spp. (Callichthyidae) and the proposal of COII gene as an additional fragment for barcoding gyrodactylids
by
Boeger, W.A., Universidade Federal do Parana (UFPR), Curitiba (Brazil). Dept. de Zoologia
,
Bueno-Silva, M., Universidade Federal do Parana (UFPR), Curitiba (Brazil). Dept. de Zoologia
in
ANALISIS BIOLOGICO
,
ANALYSE BIOLOGIQUE
,
ANATOMIA ANIMAL
2014
Based on molecular markers (COII and ITS1-ITS2) and morphological data, we describe three new Neotropical species of Gyrodactylus from Scleromystax barbatus and Scleromystax macropterus from southern Brazil. The three new species can be distinguished from each other by sequences of both molecular markers and morphology of hooks and anchors. Gyrodactylus bueni sp. n. is characterised by having hook with shaft curved, heel straight, shelf straight, toe pointed, anchor with superficial root slender, elongate and male copulatory organ armed with two rows of spinelets. Gyrodactylus major sp. n. presents hook with shaft, point curved, proximal shaft straight, heel convex, shelf convex, toe concave, anchor with superficial root robust and male copulatory organ armed with two rows of spinelets. Gyrodactylus scleromystaci sp. n. presents hook with shaft, point recurved, heel convex, shelf convex, toe pointed, anchor with superficial root curved and male copulatory organ armed with two rows of spinelets. These species appear to be closely related to other species of Gyrodactylus known from other species of Callichthyidae. These new species, however, differ by the comparative morphology of the haptoral hard structures and molecular data. Comparative analysis of sequences from these species of Gyrodactylus suggests that the COII gene may represent an important marker for the taxonomy of species of Gyrodactylidae and, perhaps, for species of other lineages of Monogenoidea.
Journal Article
Identification of angiotensin I-converting enzyme inhibitory peptides derived from salmon muscle and their antihypertensive effect
by
Tada, M
,
Kawarasaki, M
,
Tatsuta, K
in
ANGIOTENSIN
,
angiotensin I-converting enzyme inhibitory activity
,
ANGIOTENSINA
2008
The salmon peptide digested from salmon muscle showed a strong inhibitory activity against the angiotensin I-converting enzyme (ACE). The antihypertensive effect of the salmon peptide on spontaneously hypertensive rats (SHR) was examined. After the single intravenous administration of the salmon peptide at a dose of 30 mg/kg body weight, the systolic blood pressure (SBP) was significantly reduced against the control. Further, a double-blind, placebo-controlled, parallel-group study determined the efficacy of the salmon peptide in mild hypertensive subjects. The SBP, after a 1.0 g of salmon peptide intake, was significantly reduced at 4 weeks after the intake, and 2 weeks after the intake finished, compared to the value before ingestion. Bioassay-guided separation of the salmon peptide, using a combination of column chromatographic techniques, led to the identification of 20 active di- and tri-peptides, including Ile-Val-Phe and Phe-Ile-Ala as two new ACE inhibitory tripeptides. Ile-Trp had the strongest ACE inhibitory activity. (IC
50
=1.2μM)
in vitro
, and contributed 5.2% to the total ACE inhibitory activity. The salmon peptide and Ile-Trp showed a digestive resistance by
in vitro
assay, which mimicked the digestive organ, and had no affinity for factors related to blood pressure regulation, except for the ACE inhibitory activity.
Journal Article
Taxonomy of Eurotium Species Isolated from Meju
by
Samson, Robert A., CBS-KNAW Fungal Biodiversity Centre, Utrecht, the Netherlands
,
Kwon, S.W., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
,
Lee, M.N., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
in
Bacterial Typing Techniques
,
Biomedical and Life Sciences
,
E. chevalieri
2011
Eurotium strains were isolated front 77 loaves of meju (dried fermented soybeans), in various regions of Korea front 2008 to 2010. Morphological characteristics and DNA sequences of β-tubulin were examined. They were identified as Eurotium amstelodami, E. chevalieri, E. herbariorum, E. repens, E. rubrum, and E. tonophilum. Of these species, E. chevalieri and E. tonophilum had not been previously reported in association with meju. E. chevalieri and E. repens were the species isolated most frequently. This paper summarizes the morphological characteristics of six Eurotium species and provides key to identify the species from meju.
Journal Article